Photo-, thermo-, solvato-, and electrochromic spiroheterocyclic compounds

Article Abstract:

The synthesis and the spectral and photochemical properties of spiropyrans and spirooxazines, particularly in the context of their application in a variety of photo- and thermochromic materials and devices are reviewed. The study shows the readiness of the spiro carbon sites of various spiroheterocyclic compounds to break the C (Sub spiro) -X (X = C, N, O, S, Se) bonds, leading to the inclusion of the carbon atom in an extended Pi-conjugated system of the formed ring-opened isomer.

Carbon, Chemical synthesis

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Mechanistic aspects of C-H activation by Pt complexes

Article Abstract:

An exploration of the C-H bond activation step in the Shilov cycle is presented and the oxidation and functionalization are briefly discussed. The C-H activation mechanism is determined not only by the nature of the metal center but also is strongly dependent on the reaction conditions.

Analysis, Platinum group catalysts

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C-C, C-O, C-N bond formation on s[p.sup.2] carbon by Pd(II)-catalyzed reactions involving oxidant agents

Article Abstract:

The formation of the C-C, C-O and C-N bonds on s[p.sup.2] carbon by employing a palladium (Pd(II))-oxidant agent catalytic system is discussed. The Pd catalysis system is found to be extremely versatile and hence can be used at different reaction conditions.

Usage, Observations, Palladium catalysts

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